A heatproof mat is piece of
apparatuscommonly used in tabletop lab experiments involving moderate temperatures (e.g. bunsen burners) to prevent damage to a work surface.
Traditionally, such mats were made of
asbestos, often reinforced with a metal mesh, but fiberglassor other substitutes are now used because of the toxicity of asbestos fibres.
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Bunsen burner — Infobox Laboratory equipment name = Bunsen Burner caption = A Bunsen Burner with needle valve. The hose barb for the gas tube is facing left and the needle valve for gas flow adjustment is on the opposite side. The air inlet on this particular… … Wikipedia